xref: /illumos-gate/usr/src/lib/libm/i386/src/ceil.S (revision ed093b41a93e8563e6e1e5dae0768dda2a7bcc27)
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
23 */
24/*
25 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
26 * Use is subject to license terms.
27 */
28
29	.file	"ceil.s"
30
31#include "libm.h"
32LIBM_ANSI_PRAGMA_WEAK(ceil,function)
33
34	ENTRY(ceil)
35	subl	$8,%esp
36	fstcw	(%esp)
37	fldl	12(%esp)
38	movw	(%esp),%cx
39	orw	$0x0c00,%cx
40	xorw	$0x0400,%cx
41	movw	%cx,4(%esp)
42	fldcw	4(%esp)			/ set RD = up
43	frndint
44	fstcw	4(%esp)			/ restore RD
45	movw	4(%esp),%dx
46	andw	$0xf3ff,%dx
47	movw	(%esp),%cx
48	andw	$0x0c00,%cx
49	orw	%dx,%cx
50	movw	%cx,(%esp)
51	fldcw	(%esp)			/ restore RD
52	addl	$8,%esp
53	ret
54	.align	4
55	SET_SIZE(ceil)
56